Leslie Jones was low on dress options for the premiere of ?Ghostbusters,? so the starring actress turned to Twitter late last month to vent her frustration. Christian Siriano raised his hand (via emoji) and swooped in to design a gown fit for her summer blockbuster premiere. Jones debuted that dress, a long cherry red off-the-shoulder gown, with high leg slit for good measure, at the movie?s premiere in Los Angeles on Saturday night. ?Ghostbusters? is out Friday.